While the many trajectories of Sonic Youth’s 30 year existence are likely not fully encapsulatedby a mere two hour radio episode, we’re going to take a stab here today with an assortment of off-the-mainstream grid selections from the band’s (and host’s) archives today, joined by 1985-2011 drummer Steve Shelley. He’s certainly one of the best fellows I know, and an avid radio-head himself on outlets like The New and Untitled Show on WYXR in Memphis co-hosted with Tim Prudhomme, Aspirin-Mint on Veveno in Sao Paulo with Paulo Kishimoto, and a country-tinged program DJ For A Day on Gimme Country with Steve Shepherd. Tireless work in the last couple years on Sonic Youth’s Bandcamp has resulted in a treasure trove of rare studio and live uploads, some of which are culled from for today’s program. Turn up the speakers and bathe in some Sonic bliss with a raging selection of live…